Agromyza polygoni Hering, 1941

on Bistorta

mine

Initially a narrow corridor, that widens into an elongated blotch. Frass at first very fine, later in coarse granules. Often the mines are conspicuously coloured violet red (Buhr, 1964a); they mainly occur in the lower leaves (Hering, 1941a).

hostplants

Polygonaceae, monophagous

Bistorta officinalis.

phenology

Larvae in July (Hering, 1957a).

distribution within Europe

From the Baltic States to France (cf. PESI, 2018).

larva

The larvae are described by de Meijere, as Agromyza sp. (1937a: 174;1938a: 67). Anterior spiraculum with ± 10 papillae.

references

Beiger (1970a), Buhr (1964a), Černý & Merz (2005a, 2007a), Hering (1941a, 1957a), Huber (1969a), de Meijere (1937a, 1938a), Pakalniškis (1995a), Papp & Černý (2015a), Seidel (1957a), von Tschirnhaus (1999a), Winqvist, Černý & Andersen (2020a).